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Who has the Flu

Quiz by Zhao

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30 questions
Show answers
  • Q1
    What is the first line of defense against a virus that enters the body?
    B cells
    Antibodies
    Memory cells
    Macrophages
    30s
  • Q2
    Which cells present antigens on their surface after engulfing a virus?
    Natural killer cells
    T cells
    B cells
    Macrophages
    30s
  • Q3
    Where do antigen-presenting cells migrate to activate B and T cells?
    Thymus
    Spleen
    Lymph nodes
    Bone marrow
    30s
  • Q4
    What do activated B cells secrete?
    Cytokines
    Antibodies
    Antigens
    Hormones
    30s
  • Q5
    What do memory B cells do?
    Secrete antibodies
    Kill infected cells
    Quickly activate an immune response
    Present antigens
    30s
  • Q6
    How does the immune response differ in a vaccinated individual?
    Same response
    Faster response
    No response
    Slower response
    30s
  • Q7
    What result is expected from a PCR test for an uninfected individual?
    No amplification
    High amplification
    Medium amplification
    Low amplification
    30s
  • Q8
    What result is expected from a PCR test for an unvaccinated and infected individual?
    High amplification
    Low amplification
    No amplification
    Medium amplification
    30s
  • Q9
    What is the expected result of an ELISA test for a never-vaccinated and uninfected individual?
    Positive
    High positive
    Negative
    Medium positive
    30s
  • Q10
    What is the expected result of an ELISA test for a never-vaccinated and previously infected individual?
    Negative
    High positive
    Medium positive
    Low positive
    30s
  • Q11
    What is the expected result of an ELISA test for a previously vaccinated individual?
    High positive
    Medium positive
    Negative
    Low positive
    30s
  • Q12
    Which cells kill infected cells at the site of infection?
    Natural killer cells
    Macrophages
    B cells
    Dendritic cells
    30s
  • Q13
    How are antibodies specific?
    They bind to toxins only
    They bind to bacteria only
    They bind to any antigen
    They bind to viral antigens
    30s
  • Q14
    How is a vaccinated individual protected?
    No protection
    Slow immune response
    No immune response
    Rapid immune response
    30s
  • Q15
    What does PCR detect?
    Antibodies
    Immune response
    Antigens
    Viral RNA
    30s

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